新增删除分享码功能

internal/cache/share_code_cache.go

@@ -28,6 +28,7 @@
 //	创建: Lua 原子写入 hash + SADD pending + ZADD mac 索引
 //	查询: ZREMRANGEBYSCORE 清过期索引 → ZRANGE 取剩余 → HGETALL 兆底校验
 //	导入: HGETALL hash → HSET import:pending (幂等)
+//	删除: 校验 mac+code → DEL hash + SREM pending + ZREM mac 索引
 //	持久化: 每 5 分钟任务 SMEMBERS/HGETALL pending → INSERT DB → 移除 pending 条目
 package cache
 
@@ -84,6 +85,27 @@ redis.call('EXPIRE', KEYS[3], tonumber(ARGV[9]))
 return 1
 `)
 
+var shareDeleteScript = redis.NewScript(`
+if redis.call('EXISTS', KEYS[1]) == 0 then
+  return 0
+end
+if redis.call('HGET', KEYS[1], 'mac_addr') ~= ARGV[1] then
+  return -1
+end
+redis.call('DEL', KEYS[1])
+redis.call('SREM', KEYS[2], ARGV[2])
+redis.call('ZREM', KEYS[3], ARGV[2])
+return 1
+`)
+
+type ShareDeleteResult int
+
+const (
+	ShareDeleteNotFound ShareDeleteResult = 0
+	ShareDeleteForbidden ShareDeleteResult = -1
+	ShareDeleteOK ShareDeleteResult = 1
+)
+
 type ShareImportPendingLog struct {
 	MacAddr   string `json:"mac_addr"`
 	ShareCode string `json:"share_code"`
@@ -296,6 +318,18 @@ func (c *ShareCodeCache) ListByMac(ctx context.Context, macAddr string) ([]*Shar
 	return result, nil
 }
 
+func (c *ShareCodeCache) Delete(ctx context.Context, macAddr, shareCode string) (ShareDeleteResult, error) {
+	key := shareCodeKey(shareCode)
+	macIdxKey := shareMacIndexKey(macAddr)
+	ok, err := shareDeleteScript.Run(ctx, c.rdb, []string{key, sharePendingSet, macIdxKey},
+		macAddr, shareCode,
+	).Int()
+	if err != nil {
+		return ShareDeleteNotFound, fmt.Errorf("delete share code in redis: %w", err)
+	}
+	return ShareDeleteResult(ok), nil
+}
+
 func shareMacIndexKey(macAddr string) string {
 	return shareMacIndexPrefix + macAddr
 }